var Time = {
  // 获取当前时间戳
  getUnix() {
    var data = new Date();
    return data.getTime();
  },
  // 获取今天0点0时0秒的时间戳
  getTodayUnix() {
    var date = new Date();
    date.setHours(0);
    date.setMinutes(0);
    date.setSeconds(0);
    date.setMilliseconds(0);
    return date.getTime();
  },
  // 获取今天1月1日0点0时0秒的时间戳
  getYearUnix() {
    var date = new Date();
    date.setMonth(0);
    date.setDate(0);
    date.setHours(0);
    date.setMinutes(0);
    date.setSeconds(0);
    date.setMilliseconds(0);
    return date.getTime();
  },
  // 获取标准年月日
  getLastDate(time) {
    var date = new Date(time);
    var month = date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1;
    var day = date.getDate() < 10 ? '0'+date.getDate() : date.getDate();
    return date.getFullYear() + '-' + month + '-' + day; 
  },
  // 转换时间
  getFormatTime(timestamp) {
    var now = this.getUnix();
    var today = this.getTodayUnix();
    var year = this.getYearUnix();
    var timer = (now - timestamp) / 1000; //转换为秒级时间戳
    var tip = '';

    if(timer <= 0) {
      tip = '刚刚';
    } else if (Math.floor(timer/60) <= 0){
      tip = '刚刚';
    } else if (timer < 3600) {
      tip = Math.floor(timer/60) + '分钟前';
    } else if(timer >= 3600 && (timestamp - today >= 0)) {
      tip = Math.floor(timer/3600) + '小时前';
    } else if (timer/86400 <= 31) {
      tip = Math.ceil(timer/86400) + '天前';
    } else {
      tip = this.getLastDate(timestamp);
    }
    return tip;
  }
}

Vue.directive('time', {
  bind: function(el, binding) {
    el.innerHTML = Time.getFormatTime(binding.value);
    el._timeout_ = setInterval(function(){
      el.innerHTML = Time.getFormatTime(binding.value);
    }, 6000);
  },
  unbind: function(el) {
    clearInterval(el._timeout_);
    delete el._timeout_;
  }
})